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[January 14, 2011] (AP) Multiple systems will continue bringing wet weather to the Pacific Northwest on Friday.

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Another trough of low pressure moves over Oregon and Washington, while the previous wave of low pressure will push eastward. Temperatures will remain on the warmer side, bringing mainly rain showers to the region. Snow showers will be contained to the highest mountain passes, due to warm southerly air pushing snow levels up to 6,000 feet. Strong winds will persist with gusts up to 45 mph again Friday. This system will take a more northern track and is not likely to reach into the Sierras. However, the extreme northern regions of California will see periods of scattered rain showers.

The previous wave of low pressure will move over the northern Rockies and reach into the northern Plains. The system will trigger rain showers over Montana and Wyoming and kick up snow once it reaches the cool conditions of the Plains. Expect snowfall totals between 1 to 2 inches in the Dakotas.

Farther east, a trough of low pressure sweeps over the Great Lakes and will create more downwind lake-effect snow showers. Expect 1 to 3 inches of snow over western New York state and around 2 inches in western Michigan. Lighter snowfall is likely across the rest of the Great Lakes region.

To the South, high pressure dominates over the Southeast and pushes moisture into the Gulf of Mexico. This will bring sunny skies and mild temperatures to the central and southern Plains, as well as the Southeast and Gulf states. However, onshore flow over the western shore of the Gulf will kick up clouds, with a few scattered rain showers over eastern Texas and eastern Mexico.

Temperatures in the Lower 48 states Thursday ranged from a morning low of minus 13 degrees at Audubon, Iowa, to a high of 75 degrees at El Centro, Calif.

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Online:

Weather Underground: http://www.wunderground.com/

National Weather Service:
http://iwin.nws.noaa.gov/

Intellicast:
http://www.intellicast.com/

[Associated Press article from Weather Underground]